but before we stop troubleshooting, more questions:

1) do other projects crash when you stop them? Or just this one?
(if other projects don't crash, look for differences between the projects, such as resources used etc)

2) how many tracks are in the project?

3) if you mute all tracks, then solo one track at a time, does it still crash?

4) if one track doesn't crash, the next question is "how many tracks can be unmuted before you start to have problems?"

5) soloing one track at a time, if some tracks don't crash, pay special attention to the first track that crashes. Is it always the same track?

6) I notice you are using 3 fairly beefy soft synths. In a 32 bit app your ram is limited, and high quality synths can deplete ram. As an experiment, make a copy of the project, and in the copy change ALL of the Midi tracks to use Coyote Wavetable. If it doesn't crash after doing that, then report back and we'll discuss options.